Observation of Excess $Λ(\barΛ)$ Production in Two-Photon Processes at TRISTAN

Details Observation of Excess $Λ(\barΛ)$ Production in Two-Photon Processes at TRISTAN Observation of Excess $Λ(\barΛ)$ Production in Two-Photon Processes at TRISTAN

1995-01-05

arxiv.org/abs/hep-ex/9501002v1

Phys.Lett.B347:179-186,1995

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, latex format (article), 3 figures, submitted for publication

Scientific paper

10.1016/0370-2693(95)00142-8

We have carried out inclusive measurements of $\Lambda(\bar{\Lambda})$ production in two-photon processes at TRISTAN. The mean $\sqrt{s}$ was 58 GeV and the integrated luminosity was 265 pb$^{-1}$. Inclusive $\Lambda (\bar{\Lambda})$ samples were obtained under such conditions as no-electron, anti-electron, and remnant-jet tags. The data were compared with theoretical calculations. The measured cross sections are two-times larger than the leading-order theoretical predictions, suggesting the necessity of next-to-leading-order Monte-Carlo generator.

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